Shoe finishing machine



Nov. 21, 1933. c. E. THlBAUDEAU 1,935,363

SHOE FINISHING MACHINE Filed July 8, 1931 3 Sheets-Sheet 1 //\/\/E/\/7 U/? M WM Nov. 21, 1933. c. E. THIBAUDEAU SHOE FINISHING MACHINE Filed July 8, 1931 3 Sheets-Sheet 2 Nov. 21, 1933. c. E. THIBAUDEAU 1,935,363

SHOE FINISHING MACHINE Filed July 8, 1931 3 Sheets-Sheet 3 mam Patented Nov. 21, 1933 PATENT OFFICE SHOE FINISHING MACHINE Charles E. Thibaudeau, Ivry-sur-Seine, France,

assignor to United Shoe Machinery Corporation, Boston,

Mass, Jersey a corporation of New Application July 8, 1931, Serial No. 549,387, and in France July 30, 1930 19 Claims.

This invention relatesto shoe finishing ma-- chines and is herein illustrated as embodied in a device for burnishing the sole edges of shoes.

It is well known to' those skilled in the art of finishing shoes that the sole edge burnishing operation can be'performed best by the use of a machine having an oscillating tool. While individual machines of this type are in common use in shoe factories, their relatively greatexpense prohibits their general use in shoe repairing establishments where rotary tools attached to finishing shafts, carrying also a number of other tools for polishing, padding and scouring, etc., are usually employed for burnishing sole .edges. i w r w Edge burnishing machines of the typerto which this invention relates, as'heretofore commonly constructed, comprise a tool holder adapted to be oscillated, a rotating drive shaft, and a tool holder driving means for causing the tool holder to be oscillated so long as the shaft is rotated. Since, in the use of finishing machines comprising a plurality of tools forperforming different operations successively;:onlyoneof them is used at once, each tool is used during'onlya small part of the time during which the machine is I in such a machine, would be" subjected :to =considerable unnecessary wear when any of the otherfinishing tools in the machine were'in use.

One object of the invention, therefore, 'is to make it possible for'an'operator of a machine of the type-above described operatively to connect an oscillating edge setting machine attachment with or disconnect it from a finishing shaft as he wishes to useit or not. To this end, one feature of the invention consists in the provision-in a finishing machine of the combination with a tool holder, and driving means for oscillating the tool holder mounted for movement into andout. of driving engagementtherewith, of ,means for operatively connecting'the tool holder driving means with or disconnecting it from the tool :holder. the illustrated ma-.

chine, the tool holderidriving means is constituted by an arm orlever arranged to slide on the holder andalsoto engage a cam on the drive. shaft, which causes the arm to be oscillatedf v.when the shaft is rotated} An operative 'connection between the tool, holder and arm is afforded by complementary clutch faces onv the holder and armrwhich are normally urged'apart, but which may be held together by means of 'a v.co1'1trol element movable in-opposite directions and constructed and arranged to hold the clutch faces in driving engagement when in one extreme position andto allow the clutch faces to be separated as it is moved to its other extreme position. Still another feature of the invention resides inthe provision of means for releasably securing said controlling member in either of its" extreme positions whereby the driving engagement between the holder and the lever iseither maintained or prevented.

In order to insure the proper re-engagement of the above-mentioned clutch faces, the illustrated embodiment of the invention'also comprises means forming another feature thereof for limiting the movement of the tool holder in excess of its normal oscillatory movements As herein shown, the rotative'movement ofthe holder with respect to the frame, when disconnected from its driving means, is limited'by means of adjustable stops on one arranged to engage shoulders on the other. v

These and other objects and features of-the invention will become apparent from a considera-' tion of the following description'and drawings, in which- Fig. 1 is a plan view of one embodiment of the invention;

Fig. 2 is a sectional elevation taken along the line I III in Fig. 1; and

Fig, 3 is a sectional elevation taken along the line III-4H in Fig. 1.

The invention is illustrated herein as embodied "in a finishing machine of a type best known as a in retainers 14; Each of the retainers is mounted to swivel on studs 16 which are threaded into the ends of U-shaped hangers 18 which are usually made integral with framefelements (not shown) adapted to support the shaft from the floor or-from the wall.

The frame 20 for the device in which the present invention is illustrated as embodied is secured to one of the retainers 14 by means of bolts'22' and rotatably supports in the upper portion thereof a shank 24 on a tool holder 26 and" also encloses a tool-holder driving lever-or arm 28. The lever-28 is mounted to slide and torotateon the shank 24 and is continuously oscillate'd, so long as the shaft 10 is rotated,.by means of a cam 30 which rotates with the shaft 10. In order'to relieve the cam 30 from resisting any awayfrom its clutch face. in Fig. 3, is recessed and encloses the spring 70.

axial thrust of the shaft 10, which preferably is absorbed by the bearings 12, the cam is loosely mounted on the shaft 10 and arranged to bear against a shoulder 32 of the frame 20 and a flange 34 secured to the outer side of the frame 20 opposite theshoulder 32. The cam is thus prevented from having any substantial lateral movee ment in the frame 20; The camBO is caused to rotate with the shaft by means of connections comprising a collar 36 secured to the shaft by means of set screws 38, and having lugs 40 both extending from its inner radial face and entering complementary'recesses in a rim42 of the cam 30. A fibrous washer 44 retained in a groove in the flange 34 and adapted to bear on the peripheral face of the rim 42 prevents the entry of any foreign matter into the vicinity of the operating mechanism. A stud 46 fixed in the lower end of the lever 28 and carrying a cam roll 48 arranged for engagement Within the track in the cam 30 constitutes the driving connection between the cam and the lever. 7

The finishing tool 50 is of I conventional type and is secured by a collet 52, operated by a hand lever 54, in a spring chuck 56 on the lower end of a sleeve 58 slidably received in the head of the tool holder 26. Upward pressure of a shoe against the tool is yieldingly resisted by a rod 60 bearing at one end on a seat in the sleeve 58 and being urged downwardly by means of a spring 62. The above construction is more fully described in copending application Serial No. 551,- 466 filed on July 17, 1931, in the names of Keall andJones. V

While; as above pointed out, the lever 28 is constantly oscillated so long as theshaft 10 is rotated, it is not .subjected to any substantial load unless it is operatively connected with the tool of the shank 24. It thus appears that by providing a mechanism by means of which an operator can disconnect the lever 28 from the tool holder shank 24 at will, unnecessary wear in the machine which would result from the oscillation of the entire operating mechanismalthough no work is being treated is eliminated.

The above end is attained in the illustrated construction by providing cooperative clutch faces on the lever 28 and the shank 24 and mechanism for holding them in or out of driving engagement. As herein illustrated, the clutch'faces comprise shoulders on a tooth 64 radially disposed on a flange 66 effectually integral with the shank 24 and also at the sides of a recess 68, cut in the face of the lever 28 adjacent to the flange 66. While it is. desired to oscillate the tool 50, the shoulders on the tooth 64 are held in abutting relation with the sides of the recess 68 by means later to be described; but the cooperating faces of the tooth and recess are normally urged apart 'by. means of a spring '70 which bears at one end against a washer 72 abutting a ball/74 which is seated in a depression in the end of the shank 24. p

The opposite end of the spring engages the outer end of a hub '76 on the lever 28 and extending The hub, as indicated ranged to slide and to'rotate in the bearing element 78 and having adjustably fixed toits outer end a handle 84. Rotationof the control element 82 causes also an axial movement thereof on account of a helical groove 86 in the control element within which is engaged the end of a stud 88 which is fixed in the bearing element 78. An adjustable connection between the control element 82 and the hub 76'is afforded by a rod 96 threaded centrally in the control element 82 and arranged to abut a ball 92 seated in a recess in the end of the hub 76. A lock nut 94 on the outer end of the rod 90 may be tightened against the handle 84 to hold the rod in any desired position of adjustment.

It is now apparent that when the control element 82 is turned by means of the handle 84 so as to screw the control element outwardly of the bearing element '78, the spring '70 is allowed to move the lever 28 a corresponding amount in the same direction, eliminating the driving engagementbetween lever 28 and the shank 24. An opposite movement of the control element, on the other hand, causes relative approach of the clutch faces on the lever 28 and the shank 24 and sufficient continued rotation of the control element in this direction will cause the tooth 64to be held firmly in engagement with the sides of the recess 68. V

The control element 82 is arranged to be locked both in this position and at the other extreme of its travel by means of a plunger 96 (Fig. 1) slidably received in the bearing element 78 and having a pointed end arranged to be received within either of two recesses in the inner side face of the handle 84. The plunger 96 is held yieldingly in engagement with the handle 84 by means of a spring 98 bearing on the inner end of the plunger 96 and the base of the recess in which the plunger is received.

In order to insure the proper re-engagement of the tooth 64 against the sides of the recess 68 in the lever 28 when it is desired to establish the driving connection between the lever and the shank 24, the invention also provides means for limiting the movementof the tool holder in excess of its normal oscillatory movement. shown, this means comprises stop screws 100 threaded into aside. of the bearing element, '78

in the vicinity of the flange 66 which, as described. above, is fixed to, the shank 24. The inner ends of the stop screws 100 are arranged to enter notches in the flange 66 and to engage faces 102 of the notches to limit the rotative movement 'ofthe shank 24 when it is disconnected from the lever 28. The stop screws 100v may be secured in of the machine is thought to be apparent but will now'be brieflyv summarized. Assuming that the drive shaft 10 is rotating the tool holder driving lever 28 is continuously. oscillated by the cam 30 through the ,roll 48 onthe lever which extends into the cam track. 'While'the shank 24 has no substantial axial movement but only oscillates, the driving lever 28 is arranged to slide axially on the shank 24 as well as to rotate about it so that a driving connection between the lever 28 and the shank 24 maybe readily established or eliminated. Such axial movement of the lever 2 8 is As herein 7 relatively limited-and is insufficient to move the cam roll 48 out of the track in the cam30. 'The cooperating clutch faces on the flange 66 and the lever 28 tend to separate on account of the action of the spring '70 the ends of which abut theadjacent ends of the shank 24 and the hub 26 of the lever 28; but the clutch faces on the flange 66 and lever 28 are either held in engagement or, allowed to separate under the effect of the spring by a corresponding movement of the control element 82 which, when turned, moves axially either in or out of the bearing element 78.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a finishing machine, a tool holder, a shaft, means for driving said tool holder mounted for movement into and out of driving engagement therewith, means on said shaft for oscillating said tool-holder-driving means as the shaft is rotated, and means for operatively connecting said tool-holder-driving means with or disconnecting it from the tool holder.

2. In a finishing machine, a tool holder, a drive shaft, means thereon for operating said tool holder, driving means engaging said last-mentioned means mounted for movement into and out of driving engagement with said tool holder, and means for holding said tool holder and said driving means in or out of driving engagement with each other whereby the tool holder is caused to oscillate or not.

3. In a finishing machine, an oscillating tool holder, a drive shaft having a cam, means connecting said holder and cam comprising an arm engaging said cam and arranged to slide on said holder into and out of driving engagement therewith, and means for moving said arm into driving engagement with the tool holder.

4. In a finishing machine, a rotatably mounted tool holder, a rotating drive shaft, an arm for operating said holder mounted for axial movement and to rotate coaxially with respect to said tool holder, means connecting said shaft and said arm for causing the arm to be continuously oscillated, and means for moving said arm axially with respect to said tool holder thereby to establish an operative connection therebetween.

5. In a finishing machine, a drive shaft, a tool holder, an operating lever therefor constructed and arranged for clutching engagement with said holder, means on said drive shaft for causing said lever to oscillate, means tending normally to hold said holder and lever out of clutching engagement with each other, and means for maintaining driving engagement between said holder and said lever thereby to cause the tool holder to oscillate.

6. In a finishing machine, a tool holder, a frame rotatably supporting the holder, and means for limiting the rotative movement of the holder in the frame comprising adjustable stops on one arranged to engage shoulders on the other.

7. In a finishing machine, a tool holder having .a shank, a frame rotatably supporting the holder shank, said shank being notched to form opposed shoulders, and stops mounted in said frame adjustably to limit rotative movement ofsaid shank and frame.

8. In a finishing machine, a tool .holder, a rotating drive shaft, connections between said tool holder and the .drive' shaft for oscillating the tool holder constructed and arranged for movement into and out of operative engagement with the tool holder, and means for adjustably limiting movement of the tool holder when said connections are disengaged therefrom.

9.'In a finishing machine, a tool holder, a rotating drive shaft, connections between said holder and said drive shaft for oscillating the tool holder constructed and arrangedfor movedriving engagement with each other and for disconnecting them.

11. In a finishing machine, a drive shaft, a tool holder having a clutch face, a lever having a clutch face complementary to that on the tool holder and'mounted for movement on said tool holder, toward and away from said holder, means on said shaft for causing the lever to be oscillated when the shaft is rotated, means for urging said clutch faces apart, and a control element constructed and arranged to move said lever into driving engagement with said tool holder and to allow separation of the said clutch faces.

' 12. In a finishing machine, a drive shaft, a tool holder having a clutch face, a lever for operating said tool holder having a clutch face complementary to that on said holder, means on said shaft for' causing the said lever to be oscillated when the shaft is rotated, and a rotatable control element constructed and arranged to move said lever to bring its clutch face into engagement with that on the tool holder.

13. In a finishing machine, a drive shaft, a tool holder having a clutch face, a lever for operating said tool holder having a clutch face complementary to that on said holder, means on said shaft for causing the said lever to be oscillated when the shaft is rotated, and a rotatable control element constructed and arranged when turned to move said lever axially to bring its clutch face into engagement with that on the tool holder.

14. In a finishing machine, a drive shaft, a tool holder having a clutch face, a lever for operating said tool holder and having a clutch face adapted for'engagement with the clutch face on said holder, means between said holder and said lever tending to separate their clutch faces, means on said shaft for causing said lever to be oscillated when the shaft B rotated, a rotatable control element constructed and arranged when moved to bring the clutch face of the lever into engagement with that on said tool holder, and means for releasably securing said control element whereby said clutch faces are held in operative relation. v

15. In a finishing machine having a frame rotatably supporting a tool holder, a clutch face on saidtool holder, a lever rotatably supported by said tool holder and in said frame, complementary'clutch faces on said lever and said tool holder, a drive shaft, means on said drive shaft for oscillating said lever when the shaft is rotated, a control element adapted for engagement and an abutment in said frame arranged to engage said shoulder whereby said lever is moved axially when said control element is rotated.

16., In a finishing machine, a tool holder, a

rotating drive shaft, an arm connecting said tool means normally out of operative relation with respect to said holder, and means for moving said means connecting said holder and shaft into op-;

erative relation with respect to said holder whereby the tool holder is oscillated when the shaft is rotated.

18. In a finishing machine having a frame ro-' tatably supporting a tool holder, a lever mounted on said tool holder rotatably supported on said frame, cooperating clutch faces on said holder and lever, a drive shaft, means on said drive shaft for oscillating said lever when the shaft is rotated, a control element movable in opposite directions to cause said clutch faces to be held alternatively in or out of driving engagement, and means'for releasably securing said control element in either of its extreme positions.

19. In a finishing machine having a frame rotatably supporting a tool holder, a lever mounted on said tool holder rotatably supported on said frame, cooperating clutch faces on said holder and lever, a drive shaft, means on said drive shaft for oscillating said lever when the shaft is rotated, a control element movable in opposite directions to cause said clutch faces to be held alternatively in or out of driving engagement with each other, and a spring plunger adapted for engagement with seats on said control element for releasably securing it in either of its extreme positions.

' CHARLES E. THIBAUDEAU. 

